A.O. Smith BTH 199 - Component Information and Specifications; Gas Valve and Igniter Parts; Orifice Table

A. O. Smith Water Products Company Service Handbook
Irving, Texas 2000
©
Training Department
31
BTH Model Main Burner Orifice No. Main Orifice Size Inche
s
199 192477-0 0.304
150 192477-1 0.235
250 192477-2 0.360
120 192477-3 0.204
199 Prop 192477-4 .166*
150 Prop 192477-5 .141*
*-4 and -5 Red plated for propane.
** -4 and -5 stamped with "P" for propane
Note: Hex head of main burner orifice is upstream end - gas flows o
u
Orifice Tabl
e
Model AOS PT# Voltage
W.R. 36E36-319 192966-0 Nat. 24 VAC
W.R. 36C68-814 192454-1 Prop 24 VAC
Flame Rod AOS PT#
192478
AOS PT# Voltage
192478 120 VAC
Hnwl VR8305M-4009 192797-Nat. 24 VAC
W.R. 36C68-809 1922454-0 Nat. 24 VAC
Hot Surface Igniter (HSI)
HSI
Flame S
.7 Micro
COMPONENT PART INFORMATION
GAS VALVES
ORIFICE TABLE
(µ)